Arrow
Introduction
Arrows: A General Interface to Computation written by Ross Peterson.
HaWiki's ArrowsIntroduction
Examples
Parser
A good example of the mentioned arrow parsers can be seen in A New Notation for Arrows written by Ross Peterson: figure 2, 4, 6 (page 3, 5, 6).
An implementation: PArrows written by Einar Karttunen.
Stream processor
IO-like things
Fudgets
Dataflow languages
Lucid
A fast-food implementation:
A better implementation could be written using the arrow library available at the Downloads page of Arrows: A General Interface to Computation written by Antony Courtney, Henrik Nilsson and Ross Paterson.